This is horrific. Absolutely horrific.
However, we should also recognise that it puts those on the Right in a spot. Conservatives over the next few weeks will have to have the backbone to resist the inevitable calls for gun control and restricting free speech which will now be masked under accusations of “anti-Semitism” if you resist them. And yes, many of these calls will come from leftist groups which also happen to be Jewish in origin/membership, such as the ACLU, SPLC, JDL, etc.
Conservatives will need to be smart, savvy, and disciplined enough to resist both the crazy Nazis who kill Jews (the easy part) AND left-wingers who will use their Jewishness as a bludgeon and an excuse to take away our rights.
I apologize for my reaction before. It is clear you were talking about the group of Jews who use antisemitism to advance their agenda. Sorry.